Securing a physical location is a significant milestone for any growing business. Executing a commercial lease in California, however, is fundamentally different from signing a residential rental agreement. In the commercial arena, consumer protection laws have historically been limited. California law generally assumes that both parties are sophisticated business entities capable of negotiating on equal footing.
That assumption matters. A commercial lease that has not been carefully reviewed can bind a business to substantial financial obligations or create unexpected relocation exposure. Understanding the core structure of California commercial leases, and the statutory protections that now apply to certain smaller tenants, is essential before committing to any multi-year arrangement.
1. The Three Core Lease Structures
Commercial property rentals are rarely billed as a simple flat monthly fee. Landlords use distinct financial models to allocate operational, maintenance, and structural expenses between landlord and tenant.
| Lease Structure | Base Rent | Property Taxes, Insurance & CAM |
|---|---|---|
| Gross Lease (Full Service) | Higher flat fee | Covered by landlord |
| Modified Gross Lease | Moderate fee | Shared or partially split |
| Triple Net Lease (NNN) | Lower base fee | Paid fully by tenant |
The NNN Consideration
Triple Net Leases are common in retail and industrial spaces. Under an NNN arrangement, the base rent is only the starting point. The tenant is also responsible for a proportionate share of the building’s operating costs, which may include roof repairs, parking lot maintenance, and property tax increases. The actual monthly cost under a NNN lease can vary significantly from year to year.
2. Key Lease Clauses That Merit Careful Review
The following provisions appear in most California commercial leases and warrant careful attention before execution.
- Permitted Use Clause: Landlords often limit what activities a tenant may conduct within the space. A lease restricting use to “retail apparel” may mean that adding a juice bar later could give the landlord grounds to argue a breach. Broader usage language is generally more favorable to the tenant.
- Assignment and Subletting Rights: If the business changes model, downsizes, or is acquired, the ability to transfer the lease is important. Landlord “recapture clauses” can allow the landlord to terminate the lease rather than permit an assignment. These provisions merit direct negotiation.
- Maintenance Boundaries: Many commercial leases assign HVAC maintenance, repair, and eventually replacement to the tenant. This can represent a significant unexpected cost. The lease language on maintenance obligations deserves close review before signing.
3. SB 1103: The Commercial Tenant Protection Act
Historically, California commercial landlords could raise rents or terminate periodic tenancies on short notice, leaving small operators with limited leverage. SB 1103, the Commercial Tenant Protection Act, changed that landscape for a defined category of smaller tenants. Effective January 1, 2025, the statute added Civil Code section 1950.9 and amended related provisions governing rent increase notice and lease translation.
Who Qualifies as a Qualified Commercial Tenant
SB 1103 protections apply to tenants who meet the definition of a “Qualified Commercial Tenant” under the statute. Three categories of tenant qualify:
- Microenterprises: businesses with five or fewer total employees (as defined in Business and Professions Code section 18000(a)), that generally lack sufficient access to loans, equity, or other financing.
- Small restaurants: restaurants with fewer than 10 total employees.
- Eligible nonprofits: nonprofit organizations with fewer than 20 total employees.
To receive the statutory protections, a qualifying tenant must provide written notice to the landlord confirming their qualified status and self-attesting to their employee count. This notice must be provided at or before the time the lease is signed, and must be renewed annually. A tenant who fails to recertify annually may lose SB 1103 protections for that period.
Rent Increase Notice Requirements
For periodic and month-to-month tenancies involving a Qualified Commercial Tenant, SB 1103 amends Civil Code section 827(a) to require advance written notice before rent increases take effect. The applicable notice periods are:
- Increases of 10% or less (measured against the rent charged at any point during the prior 12 months): at least 30 days’ written notice.
- Increases of greater than 10% (either alone or when combined with other increases during the prior 12 months): at least 90 days’ written notice.
The rent increase does not become effective until the applicable notice period has expired. Note that these notice requirements apply to periodic and month-to-month tenancies. They do not modify fixed-term commercial leases.
Lease Termination Notice Requirements
For periodic or month-to-month tenancies with a Qualified Commercial Tenant, SB 1103 imposes the following termination notice requirements:
- If the tenant has occupied the space for one year or more: at least 60 days’ written notice before the proposed termination date.
- If the tenant has occupied the space for less than one year: at least 30 days’ written notice.
Building Operating Cost Transparency
Under Civil Code section 1950.9, landlords may not charge a Qualified Commercial Tenant for building operating costs or common area maintenance (CAM) fees unless those costs are allocated proportionately among tenants (by square footage or another verifiable metric). The landlord must also provide:
- A tabulation showing how costs are allocated among tenants.
- A signed and dated attestation from the landlord confirming the documentation and costs are accurate.
Additionally, landlords may not charge Qualified Commercial Tenants for operating costs incurred more than 18 months prior. A Qualified Commercial Tenant may raise a landlord’s violation of these provisions as an affirmative defense in an unlawful detainer or other recovery action.
Language Accessibility Requirements
If a lease with a Qualified Commercial Tenant was negotiated primarily in Spanish, Chinese, Tagalog, Vietnamese, or Korean, the landlord must provide a fully translated copy of the lease agreement before the tenant signs. Unlike some existing translation rules, SB 1103 does not allow the landlord to claim an exemption based on the tenant providing their own interpreter or translation.
If the landlord fails to provide the required translation, the tenant may have the right to rescind the agreement. The rescission right applies specifically to the translation failure and is subject to the conditions established by the statute.
Minimize Risk with Professional Legal Review
A commercial lease is often a multi-year, substantial financial commitment. A single poorly drafted clause regarding operating expenses, permitted use, or assignment rights can create significant exposure. Proactive legal review before signing is a practical investment.
Kassouni Law provides contract analysis, lease negotiation support, and civil counsel to business entities and real estate investors across California. To review a pending lease or discuss a commercial lease dispute, contact Kassouni Law to schedule a consultation with an attorney.
Frequently Asked Questions
1. Does California law give commercial tenants the same protections as residential tenants?
Generally, no. California commercial leases have historically been treated as arm’s-length agreements between sophisticated parties, with few of the statutory protections that apply to residential tenants. However, SB 1103, the Commercial Tenant Protection Act effective January 1, 2025, created a new category of “Qualified Commercial Tenant” and extended consumer-style protections to qualifying microenterprises (five or fewer employees), small restaurants (fewer than 10 employees), and nonprofits (fewer than 20 employees). Outside of those categories, most commercial tenants negotiate their lease terms without the benefit of statutory rent increase caps or mandatory notice periods.
2. What notice does a California landlord have to give before raising rent on a commercial tenant?
For most commercial leases, the notice period depends on the lease terms rather than any statutory minimum. However, if the tenant qualifies as a Qualified Commercial Tenant under SB 1103 and holds a periodic or month-to-month tenancy, specific notice rules apply. Under Civil Code section 827(a) as amended, a landlord must provide at least 30 days’ written notice before a rent increase of 10% or less (measured against the rent charged at any point during the prior 12 months), and at least 90 days’ written notice before an increase greater than 10%. The rent increase does not take effect until the applicable notice period expires. These rules apply only to qualifying tenants in periodic tenancies, not to fixed-term commercial leases.
3. What is a Triple Net (NNN) commercial lease and what costs is the tenant responsible for?
A Triple Net lease is a common commercial lease structure in which the tenant pays a base rent plus their proportionate share of the building’s operating expenses. Those expenses typically include property taxes, building insurance, and common area maintenance costs (sometimes called CAM charges), which can cover items such as roof repairs, parking lot upkeep, and shared utility costs. The base rent in a NNN lease is generally lower than in a gross or modified gross lease, but the total monthly cost can fluctuate year to year depending on operating expenses. For Qualified Commercial Tenants under SB 1103, operating costs passed through to the tenant must be allocated proportionately and documented with a signed attestation from the landlord.
4. Can a California landlord terminate a commercial lease without notice?
For fixed-term commercial leases, the lease terms govern how and when either party may terminate. For periodic or month-to-month commercial tenancies involving a Qualified Commercial Tenant under SB 1103, state law imposes minimum notice requirements. A landlord must give at least 60 days’ written notice to terminate the tenancy if the tenant has occupied the space for one year or more, and at least 30 days’ written notice if the tenant has occupied the space for less than one year. These protections apply only to tenants who have provided the required written self-certification of their qualified status. Commercial tenants who do not qualify under SB 1103 should look to their lease terms and applicable local ordinances for applicable notice requirements.
5. What should a California business owner look for before signing a commercial lease?
Several provisions in a commercial lease can significantly affect a business’s long-term exposure. The permitted use clause determines what activities the tenant can legally conduct in the space, and overly narrow language can restrict future business changes. Assignment and subletting rights determine whether the tenant can transfer the lease if the business is sold or restructured. Maintenance responsibilities, particularly for HVAC and major infrastructure, can create substantial unexpected costs if assigned entirely to the tenant. For businesses that qualify as Qualified Commercial Tenants under SB 1103, confirming that the landlord is aware of that status, and providing the required written certification before signing, may unlock additional statutory protections including advance notice of rent increases, operating cost transparency requirements, and lease translation rights. Because commercial leases often represent multi-year financial commitments, a legal review before signing can identify risks that are not apparent from a plain reading of the document.
This article is for informational purposes only and does not constitute legal advice. No attorney-client relationship is created by reading this content. California commercial lease law is fact-specific. Please contact Kassouni Law for an evaluation of your specific situation.
